Injector



A DecgZO, 1938. PQL. scoTT 2,140,600

INJECTOR Filed Oot. 20,- 1930 ats.

. materne., 193s '-iuyrrfso sfrlnssI PATENT "olistica I This invention relates to an injector. It has for one object to provide an injection or liquid supplying system inwhich a compression chamberis embodied in a housing and in which the s usual outlet or discharge valve is replaced by an injection valve. l

Another object is to combine in such an iniec# tion outfit a laminated diaphragm as themi'ivingl or yielding member.

l Other objects will appear from time to time in the specification and claim.

The inventionis illustrated more ci.' less diagrammatically in the accompanying dlwing,

whereinl l Figurel is an elevational view with parts'in section;

Figure 2 is af'transverse cross section taken at 4 line 2--2 of Figure l. s .Like parts are designated by like characters 2n throughout the specification and drawings.

A is a housing member formed on one face with an annularraisd vportion Al and a depression or l cavity A?. `Projecting from ythe opposite face is av reduced extension A3.' A perforation' or passage 2.'. A* extends from the depression A to and through the extension A3.; largement Aand a' second enlargement'A. which may be 'interiorlythreaded as shown. A second extension A" projects preferably from-one edge `:zo of the member A. A passage A'runs from the depression A to and through the extension A'. A It is *enlarged and 'preferably interloriy threaded as The annular portion Al may be threaded on its outer edge as at A1.

3.- B is a diaphragm or .movable member positioned at'its ledges upon the raised portion Ax and while it may be formed of a single member it is mier- 1 ably formed 'ofa plurality oflaminations. VA

C generally annularretaining member B1' engages 40 the threads A`1` of the raised portion Aland holds the diaphragmin sealing contact with raised i ,l portion A1. The diaphragm thuswith the housingA and the'raised portion A1 to denne what is in eiiect a pumping chamber.

45 C is a compression plate; It may be generallyA rounded in outline 'and preferably has its edges -taperedas atC1.,Itmaybe provided`wltha central projecting portion C' which is positioned in a corresponding perforation in the diaphragm.

5o The portion'C may be riveted or otherwise i shaped to engage the diaphragm as at the compression member `Cl is attached to lthe ydiaphragm so that the two move together. 0b-

v iously any other suitable means of attachment s might be provided. I hecompression member C It is provided with one enl may have a relatively raised portion C4 on one tace. In this raised portion C* a depression or groove C5 is preferably formed;

l D is a housing part, being formed generally in the shape of an incomplete annulus and fastened 5- tothe housing A by screws Dl or Lby any other suitable means. It is preferably-provided. with laterally extending oppositely placedy ears Dz by means of which the injector u nit as a whole may .be fastened to any suitable mounting. Projecting upwardly from and preferably formed integrally with the'member D is a pair of supporting member'siD, in, which a vshaft E is positioned. Movably mounted on the shaft is a sleeve-like member El.' Projecting from the member Elvis a raised l5 and preferably elongated member E2 which is in axial alignment with vthe member l!!l and with the shaft E. It is rounded at its outer edge as shown. Ea is a toggle member vprovided withva vgroove E* in one face, and being `oun'ded as at 20 E' onits other face. The rounded face Es of the member lil3 is normally positioned in the groove or depression C and the groove or hollow E. of the member E engages the member E. Laterally extending from the sleeve E1' is a p air of ears E. 25

Positioned between them is a shaft EI upon which is iournaled a connecting rod or link E.

Removably positioned in the portion A ofthe extension A'l'is a valve housing F. It is provided with a e Fl which is enlarged at' its inner so endns at!! Avalvelisseatedwithinitand is normally held seated by a spring F. A supply or intake conduit Im is fastened to the housing F by a cap or engaging member 1;

An injection nomle G, which is provided with l .a passageGl, a restriction'G2 and a discharge opening '03, is positioned within the enlarged passage A" which is in communication with the passage A4. A ball valveCi4 is'mountedwithin the passage A' and is adapted to-be seated to close 40 the passage A. It is normally held in seated position by a spring G.

It win be realized thatwhereas I have herewith shown and 'described a ,practical operative device,-

, nevertheleasmany changes might be made in the size. shape, number and disposition of parts without departing from the spirit of my invention and I wish, therefore, that myrshowing be taken as in a sense atic.

The use and operation of this invention are asA im` follows:

. The device in the particular form illustrated is adapted particularly, although not solely, for

use as aniniector to furnish'fueltoan internalcombustion engine. Whenso used it is positioned 5s so that the injection nozzle can supply fuel, that is to say, can inject fuel, into the cylinder of an engine. The nozzle in the particular form shown Vis oi the sc -called xed opening type, that is to Yjector and the parts are put into operation. With .the parts in the position shown, it is assumed that the injector is lled with fuel. The link member E8 is moved in the direction of the arrow and the sleeve E1 with the projection E2 upon it is -carried in a counter-clockwise direction. .The

toggle member E3 is thus pressed against the compression plate C and thediaphragm is forced inwardly. The amount of ymovement of the diaphragm will ordinarily be minute; as the diaphragm is moved i'n the volume of the chamber enclosed by it and the housing A is, of course, reduced. The valve F3 is held seated by the pressure within the 'chamber and when the pressure has mounted sufficiently to overcome theresistance of the spring G5 the valve G4 is unseated and discharge of fuelthrough the fixed injection orifice takes place. The movement of the link E? is reversed at a suitable point in the engine cycle. 'I'he timing and the amount of movement of the diaphragm actuating parts are adjustable and may be controlled at the will of the operator to produce the desired injection action. When the f movement of the member E8 is reversed the sleeve tion device is completed.

E1 moves in a clockwise direction, pressure on the toggle and the compression plate-.is reduced and the diaphragm moves outward again, thus increasing the volume of the chamber and reducing the pressure. [Whenthe pressure has been reduced suiciently, the valve G4 is seated and the discharge of fuel stops. Further movement of the diaphragm creates suction within the chamber, the valve E is unseatedand fuel is drawn into'the chamber. Thus the cycle of the injec- I claim: j In combination in an injector, a housing defining ai portion of -a pressure chamber, and a laminated iiexible diaphragm, attached to said housing with a' sealing contact andV dening a vportion of a pressure chamber, an inlet valve communicating with said chamber and a member defining an atpmizing orifice, said member in' communication with said chamber and forming its sole outlet, a check valve controlling said atomizing orifice, a compression plate permanently secured to said diaphragm and means for acting upon said diaphragm through said compression .plate to move the diaphragm to create pressure ,within the pressure chamber, said and a toggle, between said compression plate andsaid rotatably mounted member, means for moving the rotatably mounted member to force the toggle against the compression plate, whereby the compression plate and diaphragm` are moved to alter the volume of the pressure chamlmeans including a. rotatably mountedmember .v

ber, the diaphragm being capable of itself of re- 5 turning to its original position when free to do so. Y

PHILIP LANE SCOTT. 

